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信息发布者：
directly
training
leaflets
aims
benefits
anding
linded
ddition
About seventy per cent of the Earth is covered by water.
Emergencies should be dealt with by us at once.
The patient was operated on by Dr Zhou yesterday.
A safe and comfortable learning environment is provided for students by the school. / Students are provided with a safe and comfortable learning environment by the school.
Are the workers required to take the safety training courses by the company?
Over 20 books were written and published by the writer.
C
A
D
D
B
A
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